Relationship between FAC at plasma sheet boundary layers and AE index during storms from August to October,2001

作     者：DUNLOP M 

作者机构：Imperial College LondonLondon SW7 2AZ UK 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2008年第51卷第7期

页      面：842-848页

核心收录：

学科分类：08[工学] 082503[工学-航空宇航制造工程] 0825[工学-航空宇航科学与技术] 

基　　金：the CAS International Partnership Program for Creative Research Teams the National Natural Science Foundation of China (Grant Nos. 40621003, 40674091 and 40390150) 

主　　题：ionosphere-magnetosphere storm cases FAC AE index 

摘      要：Unlike the previous single (dual) satellite observation, the four Clusterll satellites make it possible to directly compute the continuous field-aligned current (FAC) density according to the magnetic data from them and to enable the investigation of the relationship between the FAC and geomagnetic activity. This paper analyzes the observation data when the Cluster satellites crossed the plasma sheet boundary layer (PSBL) in the magnetotail during the two magnetic storms in August to October 2001. According to the data, during the magnetic storms the relationship between the variations of FAC and AE index turned out to be: 1) FAC was obviously increasing during the storms; 2) FAC density was approximately negatively correlated with AE index from the sudden commencement to the early main phase of the storm; 3) they were approximately positively correlated during the late main phase and early recovery phase; 4) they were no apparent correlation during the late recovery phase.